Air tightness detection device for plate heat exchanger

Abstract

The utility model discloses an air tightness detection device for a plate heat exchanger, and belongs to the technical field of detection equipment. A plate heat exchanger air tightness detection device comprises a detection table, a groove is formed in the middle of the detection table, a feeding and discharging conveying assembly is installed in the groove, and an air tightness detection assembly is installed on the front side of the upper surface of the detection table. The air tightness detection assembly is composed of a mounting frame, a detection plate, two groups of first sealing covers, two groups of second sealing covers, two groups of nitrogen filling pipes, two groups of air pressure sensors and a controller, the feeding and discharging conveying assembly is matched with the air tightness detection assembly, a plurality of stations can be arranged, feeding, discharging and detection are separated, and the detection efficiency is improved. The standby time of the air tightness detection assembly is prevented from being too long, the detection efficiency is effectively improved, water does not need to be input for air tightness detection, water resource waste is avoided, and detection is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to an air tightness detection device for a plate heat exchanger. Background Art

[0002] The plate heat exchanger is composed of stamped concave and convex stainless steel plates. The concave and convex lines between the two adjacent plates are 180 degrees relative to each other, so the concave and convex ridges between the two plates of the plate heat exchanger form staggered contact points. After the contact points are combined by vacuum welding, the high-pressure staggered flow structure of the plate heat exchanger is formed. These staggered flow structures make the cold and hot fluids in the plate heat exchanger produce strong turbulence to achieve high heat exchange effect. The plate heat exchanger is composed of a group of corrugated metal plates with four corner holes on the plate for the two liquids to pass through. The metal plate is installed in a frame with a fixed plate and a movable clamping plate on the side and clamped with clamping bolts. The plate is equipped with a sealing gasket to seal the fluid channel and guide the fluid to flow alternately into each flow channel to form heat exchange. The flow rate, physical properties, pressure drop and temperature difference of the fluid determine the number and size of the plates. The corrugated plate not only increases the degree of turbulence, but also forms many supporting points, which are sufficient to withstand the pressure difference between the media.

[0003] A Chinese patent (authorization announcement number: CN 214149715 U, authorization announcement date: 2021.09.07) proposes a plate heat exchanger air tightness detection device. The patent designs litmus solution, carbon dioxide and ammonia to achieve that when the heat exchanger leaks, a chemical reaction will produce different colors, which can quickly identify which cavity is leaking. The first gas tank and the second gas tank are designed to achieve a fast speed when the gas fills the chamber of the heat exchanger, saving time. The motor and rope are designed to lift the heat exchanger to facilitate maintenance personnel.

[0004] The above patent requires that the heat exchanger be lifted up by a motor and a rope for each test before an air tightness test is performed. However, due to the large number of plate heat exchangers produced, the air tightness test equipment is in standby mode each time the plate heat exchanger is lifted up by a motor and a rope. The test can only be performed after the plate heat exchanger is lifted up and the next plate heat exchanger is loaded. This seriously affects the efficiency of the air tightness test of the workpiece. In order to facilitate the loading and unloading of the plate heat exchanger during the air tightness test, avoid the air tightness test device from being in standby mode for too long, and improve the test efficiency, we propose an air tightness test device for a plate heat exchanger. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides an air tightness detection device for a plate heat exchanger. By cooperating with the loading and unloading conveying components and the air tightness detection components, multiple workstations can be set up, thereby separating the loading, unloading and detection, avoiding the air tightness detection component from standing by for too long, and effectively improving the detection efficiency. In addition, the device does not require the input of water for air tightness detection, thus avoiding the waste of water resources, facilitating detection, and solving the background problem.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A plate heat exchanger air tightness detection device comprises a detection platform, a groove is opened in the middle of the detection platform, a loading and unloading conveying assembly is installed inside the groove, an air tightness detection assembly is installed on the front side of the upper surface of the detection platform, and the air tightness detection assembly consists of a mounting frame, a detection plate, two groups of first sealing covers, two groups of second sealing covers, two groups of nitrogen filling pipes, two groups of air pressure sensors and a controller.

[0008] As a preferred technical solution of the present application, the mounting frame is fixedly installed on the upper surface of the detection platform, the mounting frame is fixedly connected to the detection platform, two groups of first electric push rods are installed on the mounting frame, the output ends of the first electric push rods are fixedly connected to the detection plate, the first sealing cover and the second sealing cover are fixedly connected to the detection plate through a fixing rod, the nitrogen filling pipe is fixedly installed on the corresponding first sealing cover, the air pressure sensor is fixedly installed on the corresponding second sealing cover, and the signal output end of the air pressure sensor is electrically connected to the controller through a wire.

[0009] As a preferred technical solution of the present application, a second electric push rod is installed at the top of the mounting frame, and a positioning pressure plate is fixedly connected to the output end of the second electric push rod.

[0010] As a preferred technical scheme of the present application, the loading and unloading conveying assembly includes a conveying frame, the conveying frame is fixedly installed inside the groove, and a driven disk and an active disk are respectively installed on the left and right sides of the interior of the conveying frame, and a conveying belt is tensioned between the driven disk and the active disk. The upper surface of the conveying frame is installed with a first annular guide rail, and a first slider is slidably installed on the first annular guide rail, and a connecting block is fixedly connected to the first slider, and the connecting block is fixedly connected to the conveying belt, and a fixed plate is fixedly connected to the first slider, and a telescopic plate is slidably connected to the fixed plate, and a placement plate is fixedly connected to the telescopic plate, and a plate exchanger body is placed on the placement plate, and a driving motor is installed at the bottom of the detection table, and the output end of the driving motor is fixedly connected to the active disk, and a matching guide rail is provided on the detection table, and a guide rail block is slidably connected to the matching guide rail, and the guide rail block is fixedly connected to the placement plate.

[0011] As a preferred technical solution of the present application, a plurality of limit plates are fixedly connected to the placement plate.

[0012] As a preferred technical solution of the present application, the outer surface of the conveying frame is provided with multiple groups of second annular guide rails, the second annular guide rails are slidably connected with second sliders, the multiple groups of second sliders are commonly connected with a support plate, and the support plate is fixedly connected to the fixing plate.

[0013] Compared with the prior art, the utility model provides a plate heat exchanger air tightness detection device, which has the following beneficial effects:

[0014] 1. The plate heat exchanger air tightness detection device can be set with multiple workstations by cooperating with the loading and unloading conveying components and the air tightness detection components, thereby separating the loading, unloading and detection, avoiding the long standby time of the air tightness detection component, effectively improving the detection efficiency, and solving the problem of the inconvenience of loading and unloading in the background technology, which causes the long standby time of the detection equipment.

[0015] 2. The plate heat exchanger air tightness detection device, during detection, the first sealing cover seals one end of the product, and the second sealing cover seals the other end of the product, and then the nitrogen filling pipe fills nitrogen into the product, and the air pressure sensor detects the air pressure inside the product. The personnel judge whether the product is qualified according to the air pressure value displayed on the controller, and this detection device does not need to input water for air tightness detection, which avoids waste of water resources and is convenient for detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the top view of the loading and unloading conveying assembly of the utility model;

[0018] Figure 3 This is a bottom view of the structure of the loading and unloading conveying assembly of the utility model;

[0019] Figure 4 This is a schematic diagram of the airtightness detection component structure of the utility model from another perspective;

[0020] Figure 5 It is a schematic diagram of the installation structure of the loading and unloading conveying components and the testing platform of the utility model.

[0021] In the figure: 1. test table; 2. matching guide rail; 3. groove; 4. loading and unloading conveying assembly; 5. placement plate; 6. plate exchanger body; 7. controller; 8. air tightness detection assembly; 9. active disk; 10. telescopic plate; 11. guide rail block; 12. conveying frame; 13. fixed plate; 14. limit plate; 15. conveyor belt; 16. second annular guide rail; 17. support plate; 18. drive motor; 19. first slider; 20. driven disk; 21. first annular guide rail; 22. second electric push rod; 23. positioning pressure plate; 24. mounting frame; 25. nitrogen filling pipe; 26. first sealing cover; 27. test plate; 28. first electric push rod; 29. ​​second sealing cover; 30. air pressure sensor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides a technical solution: an air tightness detection device for a plate heat exchanger, comprising a detection platform 1, a groove 3 is opened in the middle of the detection platform 1, a loading and unloading conveying assembly 4 is installed inside the groove 3, an air tightness detection assembly 8 is installed on the front side of the upper surface of the detection platform 1, and the air tightness detection assembly 8 is composed of a mounting frame 24, a detection plate 27, two groups of first sealing covers 26, two groups of second sealing covers 29, two groups of nitrogen filling pipes 25, two groups of air pressure sensors 30 and a controller 7.

[0024] When in use, the product is placed in the loading and unloading conveying assembly 4, and the loading and unloading conveying assembly 4 conveys the product to the position of the airtightness detection assembly 8. The airtightness detection assembly 8 performs an airtightness detection on the product. After the detection, the loading and unloading conveying assembly 4 conveys the product, and personnel can remove the product after the detection, thereby improving the detection efficiency.

[0025] The mounting frame 24 is fixedly mounted on the upper surface of the detection platform 1, and the mounting frame 24 is fixedly connected to the detection platform 1. Two groups of first electric push rods 28 are installed on the mounting frame 24. The output ends of the first electric push rods 28 are fixedly connected to the detection plate 27. The first sealing cover 26 and the second sealing cover 29 are fixedly connected to the detection plate 27 through a fixing rod. The nitrogen filling pipe 25 is fixedly mounted on the corresponding first sealing cover 26. The air pressure sensor 30 is fixedly mounted on the corresponding second sealing cover 29. The signal output end of the air pressure sensor 30 is electrically connected to the controller 7 through a wire.

[0026] A second electric push rod 22 is installed at the top of the mounting frame 24 , and a positioning plate 23 is fixedly connected to the output end of the second electric push rod 22 .

[0027] The working principle of the airtightness detection component 8 is as follows: when the product reaches the position of the detection plate 27, the first electric push rod 28 drives the detection plate 27 to move toward the product, the first sealing cover 26 seals one end of the product, and the second sealing cover 29 seals the other end of the product. Then, the nitrogen filling pipe fills nitrogen into the interior of the product, and the air pressure sensor 30 detects the air pressure inside the product. The personnel judge whether the product is qualified by the air pressure value displayed on the controller 7.

[0028] The loading and unloading conveying assembly 4 includes a conveying frame 12, which is fixedly installed inside the groove 3. A driven disk 20 and an active disk 9 are respectively installed on the left and right sides of the inside of the conveying frame 12. A conveyor belt 15 is tensioned between the driven disk 20 and the active disk 9. A first annular guide rail 21 is installed on the upper surface of the conveying frame 12. A first slider 19 is slidably installed on the first annular guide rail 21. A connecting block is fixedly connected to the first slider 19, and the connecting block is fixedly connected to the conveyor belt 15. A fixed plate 13 is fixedly connected to the first slider 19, and a telescopic plate 10 is slidably connected to the fixed plate 13. A placement plate 5 is fixedly connected to the telescopic plate 10, and a plate exchanger body 6 is placed on the placement plate 5. A driving motor 18 is installed at the bottom of the detection table 1, and the output end of the driving motor 18 is fixedly connected to the active disk 9. A matching guide rail 2 is provided on the detection table 1, and a guide rail block 11 is slidably connected to the matching guide rail 2, and the guide rail block 11 is fixedly connected to the placement plate 5.

[0029] A plurality of limiting plates 14 are fixedly connected to the placement plate 5 .

[0030] Working principle of loading and unloading conveying assembly 4: When in use, the loading station personnel place the plate exchanger body 6 on the empty placement plate 5, and the multiple groups of limit plates 14 can position the plate exchanger body 6 to prevent the plate exchanger body 6 from falling during transportation. The driving motor 18 will drive the conveyor belt 15 to rotate. When the conveyor belt 15 rotates, it will drive the fixed plate 13, the telescopic plate 10, the placement plate 5 and the plate exchanger body 6 to be transported in a circular manner. When the plate exchanger body 6 is about to reach the detection station, the telescopic plate 10 will move forward under the action of the matching guide rail 2. Extension, the plate exchanger body 6 will move to the position of the airtightness detection component 8, and then the airtightness detection component 8 will perform an airtightness detection on the plate exchanger body 6. After the detection is completed, the conveyor belt 15 continues to rotate, and the plate exchanger body 6 will rotate to the material picking station. The personnel at the material picking station will take down the plate exchanger body 6 and mark the unqualified products. Then the empty placement plate 5 will be transferred to the loading station personnel, and then the device will separate loading, unloading and detection to avoid the airtightness detection component 8 from being in a standby state for too long, effectively improving the detection efficiency.

[0031] The outer surface of the conveying frame 12 is provided with multiple sets of second annular guide rails 16 , on which second sliding blocks are slidably connected, and the multiple sets of second sliding blocks are commonly connected with a support plate 17 , which is fixedly connected to the fixing plate 13 .

[0032] When the conveyor belt 15 rotates, the conveyor belt 15 will drive the second sliding block to move along the second annular guide rail 16 , thereby improving the movement stability of the fixing plate 13 .

[0033] Working principle: When in use, the personnel at the loading station place the plate exchanger body 6 on the empty placement plate 5. The multiple groups of limit plates 14 set can position the plate exchanger body 6 to prevent the plate exchanger body 6 from falling during transportation. The driving motor 18 will drive the conveyor belt 15 to rotate. When the conveyor belt 15 rotates, it will drive the fixed plate 13, the telescopic plate 10, the placement plate 5 and the plate exchanger body 6 to be transported in a circular manner. When the plate exchanger body 6 is about to reach the detection station, the telescopic plate 10 will extend forward under the action of the matching guide rail 2, and the plate exchanger body 6 will move to the position of the air tightness detection component 8;

[0034] The first electric push rod 28 drives the detection plate 27 to move toward the product, the first sealing cover 26 seals one end of the product, and the second sealing cover 29 seals the other end of the product. Then, the nitrogen filling pipe fills nitrogen into the product, and the air pressure sensor 30 detects the air pressure inside the product. The personnel judge whether the product is qualified according to the air pressure value displayed on the controller 7;

[0035] After the inspection is completed, the conveyor belt 15 continues to rotate, and the plate exchanger body 6 will rotate to the material picking station. The personnel at the material picking station will take down the plate exchanger body 6 and mark the unqualified products. After that, the empty placement plate 5 will be transferred to the loading station personnel. Then, the device separates loading, unloading and inspection, avoiding the long standby time of the airtightness detection component 8, and effectively improving the detection efficiency.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plate heat exchanger air tightness detection device, comprising a detection platform (1), characterized in that: A groove (3) is provided in the middle of the detection platform (1), a loading and unloading conveying assembly (4) is installed inside the groove (3), an airtightness detection assembly (8) is installed on the front side of the upper surface of the detection platform (1), and the airtightness detection assembly (8) is composed of a mounting frame (24), a detection plate (27), two groups of first sealing covers (26), two groups of second sealing covers (29), two groups of nitrogen filling pipes (25), two groups of air pressure sensors (30) and a controller (7).

2. A plate heat exchanger air tightness detection device according to claim 1, characterized in that: The mounting frame (24) is fixedly mounted on the upper surface of the detection platform (1), and the mounting frame (24) is fixedly connected to the detection platform (1). Two groups of first electric push rods (28) are mounted on the mounting frame (24), and the output ends of the first electric push rods (28) are fixedly connected to the detection plate (27). The first sealing cover (26) and the second sealing cover (29) are both fixedly connected to the detection plate (27) through a fixing rod. The nitrogen filling pipe (25) is fixedly mounted on the corresponding first sealing cover (26), and the air pressure sensor (30) is fixedly mounted on the corresponding second sealing cover (29). The signal output end of the air pressure sensor (30) is electrically connected to the controller (7) through a wire.

3. The plate heat exchanger air tightness detection device according to claim 2, characterized in that: A second electric push rod (22) is installed at the top end of the mounting frame (24), and a positioning pressure plate (23) is fixedly connected to the output end of the second electric push rod (22).

4. The plate heat exchanger air tightness detection device according to claim 3, characterized in that: The loading and unloading conveying assembly (4) comprises a conveying frame (12), the conveying frame (12) is fixedly mounted inside the groove (3), a driven disk (20) and a driving disk (9) are respectively mounted on the left and right sides of the conveying frame (12), a conveying belt (15) is tensioned between the driven disk (20) and the driving disk (9), a first annular guide rail (21) is mounted on the upper surface of the conveying frame (12), a first slider (19) is slidably mounted on the first annular guide rail (21), a connecting block is fixedly connected to the first slider (19), and the connecting block is fixedly connected to the conveying belt (15), the A fixed plate (13) is fixedly connected to the first sliding block (19), a telescopic plate (10) is slidably connected to the fixed plate (13), a placement plate (5) is fixedly connected to the telescopic plate (10), a plate exchanger body (6) is placed on the placement plate (5), a driving motor (18) is installed at the bottom of the detection platform (1), an output end of the driving motor (18) is fixedly connected to the active disk (9), a matching guide rail (2) is provided on the detection platform (1), a guide rail block (11) is slidably connected to the matching guide rail (2), and the guide rail block (11) is fixedly connected to the placement plate (5).

5. The plate heat exchanger air tightness detection device according to claim 4, characterized in that: A plurality of limiting plates (14) are fixedly connected to the placement plate (5).

6. The plate heat exchanger air tightness detection device according to claim 5, characterized in that: The outer surface of the conveying frame (12) is provided with a plurality of groups of second annular guide rails (16), the second annular guide rails (16) are slidably connected to second sliders, the plurality of groups of second sliders are commonly connected to a support plate (17), and the support plate (17) is fixedly connected to the fixing plate (13).

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